Scaffold



Aug. 15, 1933. C ADAMS 1,922,069

SCAFFOLD Filed July 28, 1931 f2 6/ //v VENT'OR C/aaae H Adams [By W WATTORNEYS 4 In the embodiment of my invention illustrated, it is desiredto raise the working platform, the

. 5 sides of the columns 10 and are provided with placed in positionbetween the jack support and Patented Aug. 15, 1933 v UNITED STATESPATENT OFFICE SCAFFOLD Claude H. Adams, Glens Falls, N. Y.

Application July 28, 1931. Serial No. 553,488

3 Claims. (01. 30429) My invention more particularly relates to a abracket 19 on which the base portion 151 of the scaffold which is ofsimple construction and jack is supported, a block 191 preferably beingwhich may readily be raised or lowered from beinterposed between thebracket and the base of neath the working scaffold, and which mayreadthe jack. The bracket 19 and the block 191 are 5 ily be supported inany desired position on suitprovided with holes to receive the lower endof the able columns. jack screwy A suitable block 20 may also be Anotherobject of my invention is the provision interposed between the upperportion of the jack of a foot scaffold supported from the working andthe needle beam 13. scaffold so that the entire scaffold may be raisedThe foot scaffold, on which the operator stands,

10 and lowered as a unit. preferably comprises beams 21 which may beAnother object of my invention is the provithe same structurally, as theneedle beams 13 but sion of needle beams for the scaffolding whichusually of lighter construction, and are provided are forked at theirends and embrace the columns with pins 22 by which they may be suspendedby and engage and are supported by pins which are cables 23 which engagesuitable pins 24 in the 15 received in spaced openings in the columns.working scaffold. Planks or boards 25 are also My invention will best beunderstood by referlaid upon the beams 21. ence to the accompanyingdrawing in which I By operating the jack, the entire scaffold, inhaveillustrated a preferred embodiment thereof cluding the working scaffoldand the foot scafand in which Fig. 1 is a side view of a fragmenfold,are raised as a unit by the operator from 20 tary portion of a columnand one end of a scaifold beneath the working scaffold. When theworksupported thereby; Fig. 2 is a fragmentary end ing scaffold has beenelevated to the desired poview of a portion of Fig. 1; Fig. 3 is afragmentary sition, the pins 12 are inserted through openings plan viewof one end of one of the needle beams. 11 beneath the needle beams andthe working Fig. 4 is a perspective view illustrating a pluralityscaffold is thus conveniently held in its adjusted 25 of columns and thescaifold supported thereby, position. and Fi 5 is a perspective viewillustrating a In the embodiment of my invention illustrated modifiedform of jack support. in Fig. 5, I have illustrated a modified form ofLike reference characters indicate like parts supporting jack comprisinga block 26 which is of throughout the drawing. substantially the samewidth as the column on 30 Referring now to the drawing, 10 indicateswhich it is tobe supported and to the sides of supporting columnsprovided with openings '11 which are secured arms 27 which embracecolumn which preferably extend transversely through 10, the arms 27being provided with holes 28 the columns and in which are received pins12 through which pins may be inserted and which which extend well beyondthe columns as indiextend through openings 11 in the columns.

cated in Fig. 2. Assuming that the scaffold embodied in my 9 Needlebeams 13 are forked at their ends, as invention is used for the purposeof building a indicated in Fig. 3, and may conveniently be wall, thenwhen the wall reaches a height where formed of three strips, acomparatively short the masonry can no longer conveniently be laid,strip 131 which is substantially the same width as the working platformis placed in position by the associated column, and two longer strips132 placing the forked ends of the needle beams 13 which embrace thecolumn and engage and are over associated adjacent columns, and pinsinsupported on the ends of the pins 12. The strips serted beneath theneedle beams to hold the same 131 and 132 may conveniently be securedtogether in position at the desired height. The platform by suitableclamping bolts 14 (see Fig. 3). 30 is then laid upon the needle beams.When the needle beams are raised by suitable jacks, operator whilestanding beneath the. working indicated generally at 15, which rest uponjack scaffold places the jack supporting member 16 in supporting membersindicated generally at 16 position on the column 10, the arms 17engagprovided with arms 17 which embrace opposite ing the ends of pins121. The jack 15 is then notches 18 which engage other pins 121 in otherthe end of a needle beam, it being understood openings. The bottomportion .of the member that a similar jack is preferably placed at the16 is also provided with laterally extending arms opposite side of thescaffold beneath the opposite 181 which also embrace the columns 10. Theends of the needle beam. The operator then 11 55 member 16 is providedat its upper portion with raises the needle beam to the desired positionand places pins 12 in the openings 11 beneath the beam and on which itis then supported. The jacks and the jack supporting members may then,if desired, be carried to other parts of the scaffold for raising otherparts thereof.

When the working scaffold has reached a height Where it is inconvenientfor the operator to actuate the jacks from the ground, the foot scaffoldis suspended from the working scaffold by means of the cables 23 andthen, by standing on the foot scaffold, the operator can raise both theworking scaffold and the foot scaffold as a unit.

By forming the needle beams with forked ends, which embrace theassociated columns, there is no possibility of the needle beams beingdislodged from the supporting columns.

While I have described my invention in its preferred embodiment, it isto be understood that the Words which I have used are words ofdescription rather than of limitation and that the drawing is merelyillustrative. Hence, changes within the purview of the appended claimsmay be made without departing from the true scope and spirit of myinvention.

What I claim is:

1. In a device of the character described, a plurality of columns eachprovided with transversely extending spaced openings, supporting pinsreceived in said openings, a needle beam engaging and supported by pinsin said openings, a jack support, means for supporting the same on a pinin another opening, and a jack mounted on said support and engageablewith said needle beam.

2. In a device of the character described, a plurality of columns eachprovided with transversely extending spaced openings, supporting pinsreceived in said openings, needle beams the ends of which are forked andadapted to embrace a column and be supported by the ends of pins locatedin said openings, a jack support comprising members extending onopposite sides of the associated columns and engageable with andsupported by another pin in another opening and a jack mounted on saidsupport and engageable with a needle beam.

3. In a device of the character described, a plurality of columns eachprovided with transversely extending spaced openings, supporting pinsreceived in said openings, needle beams the ends of which are forked andadapted to embrace spaced columns and engage and be supported by pinsextending through said openings, a jack support, means for supportingthe same on a pin in another opening, a jack mounted on said support andengageable with a needle beam and a foot scaffold suspended from saidbeams.

' CLAUDE H. ADAMS.

